henshaw



(No Model.) 2 Sheets-Sheet 1.

C. E. HENSHAW.

PURIPIER.

No. 881,888. Patented 088. 18, 1888.

NA PETER; Pvwlunwgnpher, wamingwn. D. C.

NITED STATES PATENT CHARLES E. HENSHAV, OF MEDFORD, WISCONSIN, ASSIGNOR TO ALBERT J. PERKINS, OF SAME PLACE.

PURIFIER.

SPECIFICATION forming part of Letters Patent No. 391,366, dated October 16, 1888.

Application filed May 25, 1887. Serial No. 239,293. (No model.)

To @ZZ whom, it may concern:

Be it known that I, CHARLns E. H-nNsHAw, of Medford, in the county of Taylor and State of Visconsin, have invented certain Improvements in Purifiers, of which the following is a specification.

This invention relates particularly to im provenients in machines designed for use in purifying stock in the process of manufactur- Io ing iiour under the gradual-reduction system of milling.

The object that I have in view is to provide a machine by which the stock may be taken in the second break and succeeding breaks, and

the light iuiy material, black tlour, Src., re-

moved, and a thorough purification of the stock be made.

Other objects of the invention will appear from the following detailed description, taken 2o in connection with the accompanyingdrawings, which form a part of this specification,`

and in which- Figure l is alongitudinal vertical section of the machine embodying my invention. Fig. z5 2 is a vertical transverse section on line X X of Fig. 1, looking toward the head of the machine. Fig. 3 is a similar section on line YY of Fig. 1, looking in the opposite direction.

In this machine the stock is subjected to two distinct purifying operations. In the first the stock is spread out in a thin sheet through which an upward current of air is passed, carrying the lightest material into a suitable expansion-chamber, where the heaviest portion of itis allowed to fall by gravity and settle in the chamber. A part of the light materialthat is, the lightest portion of it-is carried into the fancase and blown out of the machine. The heavier portion of the stock, or that which is not raised by the rst operation, is carried into the other part of the machine and there passes over suitable screens, where it is at the same time subjected to a properly-regulated air-blast, by which the lighter material is carried out. The main portion of the stock passes through the sieves, while the coarsest portion thereof is tailed over at the end.

In the accompanying drawings, 2 represents the main easing of the 1nachine,which may be 5o of any suitable size and of any preferred construction. Arranged over the head of the machine is a chamber, 3, which is preferably of a double conical shape, having an open top which communicates with` a suitable air-conductor, 5, preferably provided with a valve, 49. I/Vithin this chamberis another chamber,

7, preferably of approximately the same shape, having an open top which communicates with the interior of the chamber 3. An open tube,

9, extends vertically through the bottom of 6o the chamber 3 and into the chamber 7, its open end being preferably arranged at a point a lit tle below the center of that chamber. A tube,

11, connected at its upper end to a suitable hopper or funnel, 13, extends downward through the chamber 3, and has an open lower end arranged within the chamber 7. A suitable outer tube, 15, provided with a valve, 17,

is connected to the lower portion of the chamber 3, and a trough or spout, 23, is arranged 7o below the open end of the tube 15 to receive the material thatis discharged from that chamber and lead it into suitable conveyers or conductors. A dischargepipe, 19, is connected to the lower part of the chamber 7, is provided with a valve, 21, and discharges the material that passes through it from the chamber 7 into a suitable conductor, 25, through which it passes to the sieves hereinafter described. A plate, 27, may, if preferred, be arranged across 8o the lower part of the chamber 7 to direct the material into the discharge-tube 19.

A vertical shaft, 3l, is mounted in suitable bearings on the frame of the machine and eX- tends upward through the tube 9 into the 85 chamber 7. This shaft is provided with a pulley, 33, or other means through which it may be driven at any desired speed. Upon the upper end of the shaft 31 are two concave disks, 35 and 37, having their convex sides 9o toward each other and forming a double concave disk. The concave portion of the upper disk,35,is therefore under the open end of the tube 11, and the concave side ofthe disk 37 is toward the open end of the tube 9.

Above the main portion of the casing 2 is a suitable air-chamber, 39, and above this airchamber,but separated from it,is an air-cham ber, 47, with which the conductor 5 communicates. A fan-casing, 41, having a suitable rco fan, 43, mounted thereimis arranged between the two air-chambers 39 and 47, about onehalf of it being located in each of said chambers. This fan-casing is provided with an open center or eye and with a discharge-tube, in the usualway. The lower chamber, 39, communicates with the fau-casing th rough the lower portion of its open center and the upper chamber communicates with this casing through the upperportion of this center.

In the main portion F the casing 2 isa longitudinally-reciprocating shoe or sieve-frame, 5l, which is preferably reciprocated by means of the eccentric 53 and a shaft, 55, or by other suitable means, in the usual Way. The head of the frame 51 is preferably provided with a suitable blank, 57, upon which the stock is received from the tube 25, and upon which it is properly distributed before passing on to the sieves.

A series of sieves, 4, 6, 8, and 10, are secured to the frame 51, their arrangement being substantially as shown in Fig. l-that is to say, the sieves are arranged in asuccession of steps, each sieve having its tail end arranged over and above the head of the next sieve in the series with an open space between the tail of one sieve and the head of the next, as shown in Fig. 1. The air-chamber above the sieves is divided into a series of compartments by the transverse divisions 59,and each compartment communicates with the air-chamber 39 by an opening, 61, having a regulatingvalve, 63.

One of the partitions 59 is preferably arranged at a point approximately over thejunction of the sieves. partition, 65, arranged near to each one of the partitions 5.9,so that the spaces between the lower ends of the partitions and the nearest partitions 59 are substantially over the point where the material falls from one sieve onto the next; A narrow compartment, 67, is therefore formed directly over the junctions of the sieves, and the air-current drawn through this compartment will be stronger than that drawn through the larger or main compartments.

The upper part of each of the compartments 67 is of greater area than the lower portions, and each of 'these compartments is provided in its enlarged portion with a spout, 69, preferably inclined in opposite directions and extending out through the sides of the machine. An opening, 7l, covered by suitable valves, 73, is preferably provided between the compartments 67 and the air-chamber 39. The sieves are preferably of different grades, the liner grade being toward the head of the machine, in the usual way. 4

An air-trunk, 75, is preferably arranged at the end of the machine and communicates with the air-chamber 39. Into this air-trunk the tail end of the sieve-frame extends, as shown in Fig. 1. Wire sieves 77 may, if preferred,

be arranged in the lower part of this air-trunk. It will be understood that the details of the construction and the form of the parts may be vsist of flour and the finest middlings.

There is also preferably a variously modified without departing from my invention.

The operation of the machine is as follows: The stock is passed into the hopper 13 and falls through the tube 11 onto the concave disk 35 in the chamber 7. The shaft 31 is rapidly rotated, and the stock is thrown by centrifugal force in a thin sheet from the edge of the disk 35. A current of air is drawn by the fan 43 upward through the tube 9, and is deflected from the under side of the concave disk 37 and passes through the stock that is thrown out from the edge of the disk 35. Thelighter material is thereby separated and carried by the air-current th rough the annular space between the outer wall of the tube ll and the edge of the opening in the chamber 7. As the aircurrent passes into the chamber 3 it is expanded and weakened, and the heavier portion of the material falls to the bottom of this chamber, from which it is discharged through the tube 15. The material thus lodged in the chamber 3 and discharged therefrom will con- The light iiuffy material and black flour will be passed into the fan-case and discharged therefrom. The stock that does not rise from the chamber 7 will collect in the lower portion thereof and will pass from that chamber through the tube 25 onto the head of the sieve. As the material passes gradually over the sieves the heavier material will pass through the sieves., while the lightest material will be raised by the air-current. That portion of the IOO air-current that passes th rough the open space i between every two sieves will be stronger, as it is unobstructed by the cloth, and as it passes through the stock, as it falls from one sieve onto the next, will separate a portion of the remaining light material therefrom. This material will be carried up by the air-cu rrent into the compartment G7, and as the air-current is expanded and weakened in the upper portion of this compartment the heavier portion of the material will fall into the spout 69 and pass out of the machine. The different grades of purified stock will pass through the different sieves and may be collected by the conveyers at the bottom of the machine. The material that passes over the last sieve will fall into the airtrunk 75 and pass over the sieves 77 therein,

-and will be subjected to an upward current of air that passes through the .air-trunk. The strength of the air-current through any of the sieves may be regulated by means of the valves 63 and 73. The strength of the current passingv through the separating-chambers 7 and 3 may be regulated by means-of the valve 49 in the conductor 5.

I claim as my inventionl 1. The combination, in a machine of the class described, of a separating-chamber, 7, the feed-tube 11, extending into said chamber, the air-tube 9, extending into said chamber through the bottom thereof, and the rotating disk 35, arranged in said chamber between the ends of said tubes 11 and 9, and means for producing an upward current of air through said tube 9 and chamber 7, substantially as described.

2. The combination, in a machine of the class described, of a separating-chamber, 7,

the feed-tube 11,extending into said chamber,

the tube 9, extending upward into said chamber, the double concave disks and 37, arranged within said chamber between the open end of said tubes 9 and 1l, means for rotating the said disks, and means for passing an up ward current of air through the tube 9 and chamber 7, substantially7 as described.

3. The combination, in a machine of the class described, of the separating chamber 7, the feed-tube 11, extending into said chamber, the air-tube 9, also extending into said chamber, the shaft 3l, extending through said tube 9, the disks 35 37, mounted upon said shaft 31 and arranged between the openings of said tubes 9 and 11, the separating-chamber 3, sur' rounding said chamber 7, and means for producing an upward current of air through said tube 9, chamber 7, and chamber 3, substantially as described.

4. The combination, in a machine of the class described, of the sieve-frame 51, the series of sieves arranged in steps in said frame, each sieve having` its tail end over and above the head of the next sieve with an open space between the tail of one sieve and the head of the next sieve, the series of transverse partitions 59, arranged in the casing above said sieves approximately over the junction of the sieves and back from the tail end of the sieves, the air-chamber 39', the top to the casing formed with the openings 61, and provided with the valves 63 and the fau 43, substantially as de scribed.

between the tail of one sieve and the head of the next sieve, the transverse partitions 59, arranged in the machine-casing, substantially over the junction of said sieves and back from the tail of the sieves, the fan-casing 41, and fan 43, substantially as described.

6. The combination, in a machine of the class described, of the sieve-frame 51,t`he series of sieves arranged in steps in said frame, the partitions forming the narrow compartments 67, enlarged at their upper ends and arranged over the junction of said sieves, the troughs 69 in the upper portions ofsaid compartments, the fan-casing, and the fan, substantially as described.

7. The combination, in a machine of the class described, of the airchambers 47 and 39, the fan-casing 41, with which both of said chambers communicate, the fan 43, the aspirating and separating chambers 3 and 7, connected with said chamber 47, and the series of sieves arranged below said chamber 39, and means for feeding the stock into the chamber 7 and from that chamber to the sieves, substantially as described.

In testimony whereof I have hereunto sctmy hand this 18th day of May, 1887.

CHARLES E. HENSHAW.

In presence of O. H. FosTER, CHAs. DIoKENsoN. 

